campus comedy

A boy was head over heels in love with a girl.Both were in the same campus but in different hostels.carried away by his love he wrote a letter to the girl in his own blood.As ill luck would have it, the girl was a medical student. after having recieved the letter,she answered. the boy ripped the envelope in order to see what was written.He recieved a shock, because only two words were mentioned in bold...... (B +ve)